Receiver lock



FIG. 1 is a perspective view of a receiver lock showing our new design;

FIG. 2 is an exploded perspective view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is an enlarged front elevational view thereof.

CLAIM The ornamental design for a receiver lock, as shown and described.